00:01
Hey there, welcome to numerade.
00:03
So we are giving some descriptive statistics analysis below, and we're trying to find the following range standard deviation and how many standard deviations.
00:15
So with that, let's do number 25 first.
00:21
Number 25.
00:22
So number 25 asks us, what is the range of the data? so to find the range of data, we basically do max minus the data.
00:32
That's the formula so let me write that range equals max maximum value minus the minimum value all right so with that formula we're gonna solve it plug in our values so we are given our maximum minute in the descriptive stats above so we're going to do 117 minus 78 equals let's calculate what that equals and that equals 39 therefore, our range over data is d -39.
01:19
Alright, so now we're 25, we're gonna move on to 26.
01:25
26 asks us, what is the standard deviation of data? so let us assume this is a sample, so just let's denote it as s.
01:36
So s basically equals the square root of the variance, s squared.
01:43
Right so therefore we're gonna we have our variance so we're gonna square root our variance here so we're gonna square root for 114 .4 .3 and if we calculate that we should get a value of around c 10 .70 all right so that will be our standard deviation by square rooting the variance awesome and finally we we have number 27 here, number 27, to how many standard deviations is a max value above the mean, mean value...